EPEVER 40A MPPT Solar Charge Controller 100V PV Max Input Negative Ground LiFePo4 Battery Charger W/ MT52 Remote Meter & Temperature Sensor Tracer4210AN

I wanted to help my sister after Hurricane Maria. It has been over 6 months that she has not had power. I put together a system that I could order from Amazon and send most of the components to Puerto Rico directly. I ordered the SolarEpic 40A MPPT Solar Charge Controller, four Uni-Solar PVL-136 PowerBond PVL 136 Watt Flexible Solar Panels, a POTEK 2000W Power Inverter Three AC Outlets 12V DC to 110V AC and the miscellaneous cables and fuses. I prewired the controller and the inverter and wrote a detailed set of instructions on how to connect everything else. Luckily, I found in PR the batteries at Batteries Plus, and I ended up using two 12 vdc 155 Amp-hours for the project. My sister and my nephew installed the system 03/03/2018 and it has been powering her fridge, a few LED lights, a fan and charging phones and computers since with no problems. These products are outstanding and provide very impressive performance.

I bought one of these for a solar setup in my cab over camper. It was basically plug and play with a lead acid battery and I've had zero issues with it this fall. When I first hooked it up, I had the polarity wrong from the solar panels. The unit didn't give a useful error message or anything, just showed no solar power, but mainly it protected itself and I was able to root-cause the problem. It has a nice timer feature that lets you auto-run a fan or whatever on a schedule if you want to move air through your camper each day.

This MPPT Charge controller seems to be working quite well. I am running 250 watts of solar panels through it to two 100ah Deep-Cycle AGM batteries. This is day 3 and even on cloudy days (here in NW Washington State), my batteries have never dipped below 12.6. And I watch 24 inch smart tv with 50 watt speakers, a small led light, and a small fan. I keep a fan on all night to help me sleep.I am really glad I bought this charge controller and and happy to give it a 5 star rating.

Works right out of the box. Could not give the full five stars due to the connectors not rugged enough for a good fit.

Wonderful charge controller. It is nice that it can take up to 1/8" thick wire, unlike so many others that can only take thinner wire even though rated for the amps. The back is lifted off the surface for cooling in a smart design. The display is very nice. The one it replaced didn't have that. Very easy to install. I shopped far and wide, and this was the best quality to cost value. You could spend triple and not really get any more!

This is going to be a strange review. I bought 3 of these for my off-grid solar system in my skoolie conversion. They have good reviews and were much cheaper than the Victron equivalent. I wanted to save some money so went with these instead. But I returned them after a week. They're not suitable for LiFePO4. Let me explain. You need a charge controller that works with the charging characteristics of the battery you are using. These controllers are designed for lead acid batteries. Their programming works with the charging curve of that type of battery. LiFePo4 has a much different charging curve and the EPEVERS controller does not have the programming needed to work with this battery's chemistry. In my system the chargers would work for a while then stop. The battery would discharge to a point where the controllers should start charging but nothing would happen. I'd need to shut off the system and restart to get controllers to work again and that's not acceptable. I need a system that works without constantly having to mess with it. So Epevers is out and Victron is in. What a difference. Victron charges up to the set point and then goes into absorption mode and does this over and over. No fiddling. That's what I need.So what's happening? Epevers simply changes some voltage settings and tries to use the lead acid charge curve with Lithium but it's not that simple. The controller needs new programming to work correctly. And it has many settings that simply don't match with the LiFePO4 charge profile.12 different voltages to set and most have nothing to do with Lithium. The Victron has 2 setting (a few more if you go into expert mode) and the programming is designed for the chemistry. So it just works. I'm sure the EPEVERS controller is great for lead acid chemistry but it fails for LiFePaO4. And that is the bottom line. So EPEVERS, some advice. Do the work and change the programming. Add a special LiFePO4 option to your device and make the settings adjustable. Make it simple to use. Do that and you'll sell a lot of controllers for Lithium.

I have been using this in my shed now for about three months I have it connected 2 to 300 W panels this thing works great I have it connected with the remote meter I believe this is a must. The remote meter let you program it more easily and it stores data that will help you manage your power and batteries for the price the quality of this thing is unbelievable I’ve had no trouble I’m new to solar power but I’m learning glad I made this purchase

I'm running 4 hqst to it with a 24v battery bank of lifepo4. Runs great and I'd recommend getting the controller. Makes it simple.